Script folder not found

I am trying to use a custom application (SPNet - ecommerce) and have uploaded the required files to the server.

However, when I try to login the below error message is returned:

"The requested URL /cgi-bin/scripts/exapp.exe was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."

I have ensured that the scripts folder has been uploaded correctly and the path is set correctly in the HTML document. I have also spoken to the company hosting my site and they have checked to make sure that CGI was enabled and that the permissions were correct.